331 Area Code: Cities, Time Zone and Zip Codes
What area code is 331? The area code 331 is located in Illinois and it serves Aurora, Naperville, Bolingbrook, Wheaton, Downers Grove, Elmhurst, Lombard, Carol Stream, Bartlett, Streamwood, Hanover Park, Addison, Glendale Heights, and some other surrounding cites. The area code 331 was created from area code 630 on July 23, 1999 and was first put to use on October 7, 2007. It has an overlay with area code 630.
The top counties that are being served by the 331 area code include Cook County, DuPage County, Kane County, Kendall County, and Will County.
The major cities under each of these counties that are being served by the 331 area code are listed below:
Cook County
The cities within Cook County that are served by the 331 area code include Lemont.
DuPage County
The cities within DuPage County that are served by the 331 area code include Addison, Aurora, Bensenville, Carol Stream, Clarendon Hills, Darien, Downers Grove, Elmhurst, Eola, Fox Valley, Glen Ellyn, Glendale Heights, Hinsdale, Itasca, Lisle, Lombard, Naperville, Oak Brook, Villa Park, Warrenville, Wayne, West Chicago, West Chicago, Westmont, Wheaton, Willowbrook, Winfield, Wood Dale, and Woodridge.
Kane County
The cities within Kane County that are served by the 331 area code include Aurora, Batavia, Big Rock, Elburn, Geneva, Kaneville, Lafox, Mooseheart, North Aurora, Saint Charles, Sugar Grove, and Wasco.
Kendall County
The cities within Kendall County that are served by the area code include Bristol, Millbrook, Montgomery, Oswego, Plano, and Yorkville.
Will County
The cities within Will County that are served by the area code include Aurora, Bolingbrook, and Naperville.
331 Area Code Time Zone
What time zone is 331 Area Code? The time zone in the 331 area code is the Central Time Zone which is abbreviated as CST. The Central Time Zone is also known as America/Chicago. The Central Standard Time is UTC/GMT -6:00.
Significance of 331 Area Code
I don’t know if you notice that there is a three-digit number that precedes a telephone number any time you receive a call from your cell phone. Any time you see the three-digit code 331, it suggests that the call comes from any of the cities or counties listed above. However, there may be an exemption to this. With the use of mobile phone or roaming phone feature, the caller may not necessarily be at any of these cities or counties at the time of calling.
Nevertheless, knowing the counties and cities that the 331 area code covers can guide you when to call a particular person. This is because the person you want to call may be in a time zone that is different from your own.
Telephone Carriers in 331 Area Code
If you want to get a wireless telephone within the 331 area code, the popular wireless telephone carriers that you can approach include Verizon Wireless, Sprint, Cingular Wireless, Cricket Comms, Bandwidthcom clec, Level 3 Comms, and T-mobile.
For landline, popular telephone carriers are Peerless Network, Ameritech, Level 3 Comms, Mci Worldcom, Local Access, Broadvox-clec, Routepoint Comm II, Xo Illinois, First Comms, Sigecom, Teleport Comms America, Digital Network Access Comms, and Sbc Internet Services.
Zip Codes in 331 Area Code
| City | County | State | Area Code | Zip Code |
| Addison | DuPage | Illinois | 331 | 60101 |
| Aurora | Kane | Illinois | 331 | 60505 |
| Aurora | DuPage | Illinois | 331 | 60502 |
| Aurora | DuPage | Illinois | 331 | 60504 |
| Aurora | Kane | Illinois | 331 | 60506 |
| Aurora | Will | Illinois | 331 | 60503 |
| Aurora | Kane | Illinois | 331 | 60507 |
| Aurora | Kane | Illinois | 331 | 60568 |
| Aurora | DuPage | Illinois | 331 | 60572 |
| Aurora | DuPage | Illinois | 331 | 60569 |
| Batavia | Kane | Illinois | 331 | 60510 |
| Bensenville | DuPage | Illinois | 331 | 60106 |
| Bensenville | DuPage | Illinois | 331 | 60105 |
| Big Rock | Kane | Illinois | 331 | 60511 |
| Bolingbrook | Will | Illinois | 331 | 60440 |
| Bolingbrook | Will | Illinois | 331 | 60490 |
| Bristol | Kendall | Illinois | 331 | 60512 |
| Carol Stream | DuPage | Illinois | 331 | 60188 |
| Carol Stream | DuPage | Illinois | 331 | 60116 |
| Carol Stream | DuPage | Illinois | 331 | 60197 |
| Carol Stream | DuPage | Illinois | 331 | 60132 |
| Carol Stream | DuPage | Illinois | 331 | 60128 |
| Carol Stream | DuPage | Illinois | 331 | 60199 |
| Clarendon Hills | DuPage | Illinois | 331 | 60514 |
| Darien | DuPage | Illinois | 331 | 60561 |
| Downers Grove | DuPage | Illinois | 331 | 60515 |
| Downers Grove | DuPage | Illinois | 331 | 60516 |
| Elburn | Kane | Illinois | 331 | 60119 |
| Elmhurst | DuPage | Illinois | 331 | 60126 |
| Eola | DuPage | Illinois | 331 | 60519 |
| Fox Valley | DuPage | Illinois | 331 | 60599 |
| Geneva | Kane | Illinois | 331 | 60134 |
| Glen Ellyn | DuPage | Illinois | 331 | 60137 |
| Glen Ellyn | DuPage | Illinois | 331 | 60138 |
| Glendale Heights | DuPage | Illinois | 331 | 60139 |
| Hinsdale | DuPage | Illinois | 331 | 60521 |
| Hinsdale | DuPage | Illinois | 331 | 60522 |
| Itasca | DuPage | Illinois | 331 | 60143 |
| Kaneville | Kane | Illinois | 331 | 60144 |
| Lafox | Kane | Illinois | 331 | 60147 |
| Lemont | Cook | Illinois | 331 | 60439 |
| Lisle | DuPage | Illinois | 331 | 60532 |
| Lombard | DuPage | Illinois | 331 | 60148 |
| Millbrook | Kendall | Illinois | 331 | 60536 |
| Montgomery | Kendall | Illinois | 331 | 60538 |
| Mooseheart | Kane | Illinois | 331 | 60539 |
| Naperville | DuPage | Illinois | 331 | 60565 |
| Naperville | Will | Illinois | 331 | 60564 |
| Naperville | DuPage | Illinois | 331 | 60563 |
| Naperville | DuPage | Illinois | 331 | 60540 |
| Naperville | DuPage | Illinois | 331 | 60567 |
| Naperville | DuPage | Illinois | 331 | 60566 |
| North Aurora | Kane | Illinois | 331 | 60542 |
| Oak Brook | DuPage | Illinois | 331 | 60523 |
| Oswego | Kendall | Illinois | 331 | 60543 |
| Plano | Kendall | Illinois | 331 | 60545 |
| Saint Charles | Kane | Illinois | 331 | 60174 |
| Saint Charles | Kane | Illinois | 331 | 60175 |
| Sugar Grove | Kane | Illinois | 331 | 60554 |
| Villa Park | DuPage | Illinois | 331 | 60181 |
| Warrenville | DuPage | Illinois | 331 | 60555 |
| Wasco | Kane | Illinois | 331 | 60183 |
| Wayne | DuPage | Illinois | 331 | 60184 |
| West Chicago | DuPage | Illinois | 331 | 60185 |
| West Chicago | DuPage | Illinois | 331 | 60186 |
| Westmont | DuPage | Illinois | 331 | 60559 |
| Wheaton | DuPage | Illinois | 331 | 60187 |
| Wheaton | DuPage | Illinois | 331 | 60189 |
| Willowbrook | DuPage | Illinois | 331 | 60527 |
| Winfield | DuPage | Illinois | 331 | 60190 |
| Wood Dale | DuPage | Illinois | 331 | 60191 |
| Wood Dale | DuPage | Illinois | 331 | 60399 |
| Woodridge | DuPage | Illinois | 331 | 60517 |
| Yorkville | Kendall | Illinois | 331 | 60560 |